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From "michael procopio (JIRA)" <>
Subject [jira] [Created] (SPARK-21140) Reduce collect high memory requrements
Date Mon, 19 Jun 2017 13:30:00 GMT
michael procopio created SPARK-21140:

             Summary: Reduce collect high memory requrements
                 Key: SPARK-21140
             Project: Spark
          Issue Type: Improvement
          Components: Input/Output
    Affects Versions: 2.1.1
         Environment: Linux Debian 8 using hadoop 2.7.2.

            Reporter: michael procopio

I wrote a very simple Scala application which used flatMap to create an RDD containing a 512
mb partition of 256 byte arrays.  Experimentally, I determined that spark.executor.memory
had to be set at 3 gb in order to colledt the data.  This seems extremely high.

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